Li Myung-hoon,
a North Korean pianist, is forced to become an assassin after his spy father’s disgrace.
To free his sister from a labor camp, he accepts a mission to South Korea to eliminate a rival agent, “Big Dipper.”
Operating as a high school student, he befriends a girl named Hye-in,
but a power struggle in North Korea soon makes him a target and exposes his superior’s betrayal.
